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Co-digestão como solução para a valorização energética de resíduos de fruta e legumes
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Autores
Orientador(es)
Resumo(s)
There is a need for new strategies for biodegradable municipal waste management, particularly fruit and vegetable wastes, which reduce the accumulation of waste in landfill.
Co-digestion of pre-treated dairy cattle slurry (LS) with pear waste after a long storage period (180 days) was investigated. Pear waste liquid fraction (PLF) was tested in co-digestion with LS at four inclusion levels: 0, 25, 75 and 100%, keeping the organic loading rate around 1.1 ± 0.4 g SV L-1 d-1.
The effect of substrate type and inclusion level on gas production rate (GPR) and specific methane production (SMP) was evaluated in a completely mixed stirring tank reactor (CSTR), performed at 37 0.5ºC for 126 days. Results showed that progressive increase of PLF percentage as co-substrate improves SMP in comparison to single substrate.
On another hand, results showed that storing pear waste for long periods does not compromise AD performance. This is important as pear production is seasonal and storage will simplify the management of this co-substrate. Overall, it can be said that co-digestion of slurry and pear waste seams an interesting approach as a farm scale energy production and waste treatment solution at a regional level.
Descrição
Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
Palavras-chave
waste management fruit and vegetable waste Rocha pear waste dairy cattlt slurry anaerobic co-digestion
Contexto Educativo
Citação
Dias, T.R.D. - Co-digestão como solução para a valorização energética de resíduos de fruta e legumes. Lisboa: ISA, 2014, 63 p.